Type-writing machine.



N0- 836,932. PATENTED NOV. 27, 1906. B. F. KUNATH.

TYPE WRITING MACHINE.

APPLICATION FILED MAR.2B, 1906.

3 SHEETS-SHEET 1.

PATENTED NOV. 27, 1906.

E. F. KUNATH.

TYPE WRITING MACHINE.

APPLICATION FILED MAR.2B,19OG.

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UNITED s-T ATEs PATENT OFFICE.

EDWARD F. KUNAIH, o jJERsEY our. NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPEWRITER. COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 27, 1906.

Application fil'd March 28, 1906. Serial No. 303,605.

' To all whom) it may concern):

- provide convenient means for use upon ordi- "a" rear view of an machine, showmgmy improvements applie "chine, partly in section.

connections Be it known that I, ED ARD F. KU'NATH, a citizen of the United States, residing in J ersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to means for propel-' ling the letter-feeding carriages of type writing machines. 4

The prlncrpal object of my invention is to nary type-Writing machines," especial] those with heavy carriages, for enabling t e carriage to be tions', thereby relieving the operator from the great tax of returning the carriage at the end of each'line of writing to begin a" new me. 1

In carrying out my invention I gear an electrical motor't'o the carriage so as to drive the same in both directi'onaand I provide at the keyboard a carriage-returning key which normally closes the "motor-circuit in a' mandirection, but which when'fdepressed operates 'a' pole-changing device"whereby the'direction of the motor is reversed and the carriage driven back to "begin a new line," a spring returning both said 'key' and polechanging device to normal position. I also provide novel means," controlled bys aid c'arriage-returning 'key, foripreventing unduly rapid returnlmovement of the carriage! I also provide means for enablin' .the motor to effect partial rotation of the platen for linespacing. Other features and advantages will hereinafter'appear. In the accompanying v Underwood, type-writin Fig; 2 is a side elevation foi'the mav Fig. 3 is a diagrammatic plan of the carriage-reversing key and Fig. 4 is a"reduced' plan of a thereto.

bottom bracket attached to the base of the machine and supporting the motor." "Fig. 5 is a front elevation showing the'keys, &c., seen at Fig. 3. 'Fig. 6 isa front perspective view showing the usual carriage-feeding da vices. T

electrically driven in both direc-' drawings, Figure 1 is y In the Underwood machine types 1, nmunted upon pivoted bars 2, strike against the'front side of a revoluble platen 3, having an axle 4 and mounted upon a carriage, a portion of which is seen-at 5. The carriage runs'upon suitable rails, one of which is seen at 6. In a pair of arms 7 8, depending from the carriage, I mount a rack 9, having teeth on its rear face and in mesh with a pinion 10 the latter fixed upon the upper end of a ver- U on the lower end of the shaft 11 is mounted a bevel-pinion 13, meshing with a pinion 14, provided upon the shaft 15, which carries the armature 16 of a motor 17, the field of which is indicated at 18, Fig. 1; The casing of the -motor is supported upon a bracket (seen at Fig. 4) and is provided with suitable stays 19. Said bracket is in the form of the letter U and is 'of suitable size and form to -fit"up against the under side of the usual framework20 of the type-writing machine. It comprises'a pair of arms 21, throu h which "'pas sthe screws 22,'that I use for astenin the upper feet 23 upon the machine. Sai

is seated the motor 1.7; I I

i The motor is underth'e' control of a key 25, placed at the'keybo'ard 'of'the machine and i fixed upon the front end of alever26, which extends forwardly'from a shatter hub 27,

pivoted in supports '28. ofsaidfhub'27is a'p'air of knives 29, each extending both forwardly and backwardly from the hub." Twopairs of sliding. contacts '31iand' 32 33 'areadapted to be engaged simulta'neously by'the rear ends of the knives, and two'pairs of similar contacts 34 35 and 36 37 areprovided'fiortheforward ends of th'e'knives but the latter are so shaped as to be out'df engagement with thefo'rwa-rd'cont'acts, an d vice versa, so that the current 'does not passlongitudinally' of either knife. Normally the" rear contacts are engaged by the knives, as at Fig. 2. The inner rear contacts 'are connected by Wires 38 and 39, respectively, to a battery or source of'power40. A wire l'connects contact 31 across .to the innenfront contact 36, and a wire 42 connects the rear contact 32 across to the inner front contact 35. he outer rear contacts 30 nor to drive the carriage in letter feeding f arnis are connected bya yoke 24 .upon which Fixed to the endstacts when engagement Withthe rear'con 'tical shaft 11, journa'led in a bracket 12.

ICQ

45, 34, 35, 42, and 39, back to 40.

and 33 are connected by Wires 43' 44 to the armature 16 of the motor. The wire 45 connects contact with the forward outer con tact 34, and a Wire 46 makes a similar connection between 33 and 37. Normally the currem runs through 38, 31, 30, 43, 16, 44, 33, 32, and 39, back to but the depres sion of the key 25 lifts the knives out of engagement with the rear contacts and de presses the forward ends into engagement with the front contacts, so that the current runs through the armature in the opposite direction, tray grsing 38, 41, 36, 37, 46, 44, 16,43, When the key is released, a spring 47 returns it to nor mal position together with the knives, Fig. 2.

A loop 48 in the wire 39 includes the iieldwindings 18 of the motor. The windings of the armature extend helically, as at 49, so

that substantial uniform torque upon the motor-shaft 15 is secured, whereby uniform pull is secured upon the carriage 5 for its letter-spacing movements.

To prevent unduly rapid return movement of the carriage, the key 25 is preferably made to operate a brake, comprising a bar 50, extending parallel with the run of the carriage and movable forward into contact with a leather facing 51, secured upon a bar 52 of the carriage. The bar is mounted upon the tops of a pair of-rock-arms 53, forming a rocking frame, and to a forwardly-extending arm 54 of this frame is connected the upper end of a link 55, Fig. 2, the lower end of which is pivoted at56 to a key-lever 57. An offset arm 58 extends from the forward end of the lever 57 beneath the carriage returning key 25, so that a depression of the latter may force down the lever 57 with the link 55, thereby rocking forward the frame 50 53, so that the bar 50 rubs upon the leather facing 51, thus preventing the carriage from attaining undue speed while returning. Preferably a thumb-screw 59 is threaded into the end of the horizontal arm 60 of the offset 58, said screw being adapted to contact with the key 25, and thus affording means for regulatin the action of the brake members 50 51. T- e downward movement of the key 25 is arrested by the contact of the forward ends of the knives with the base 61, upon which the supports 28 are erected, and when the key is in this position the screw 59 may be adjusted so as to secure the desired pressure between 50 and 51. The polechan ing devices may be incloscd in a case 62, (s iown in section at Fig. 5,) and said case may be secured upon the frame 21.

For eifcting line-space movements of the paper I mount upon one end of the carriage a short vertical shaft 63, having at its lower end a pinion 64 to mesh with a short rack 65, out upon the front face of the rack-bar 9. Said rack-bar is movable independently of the carriage, having at its ends slides 66,

4 eaaese which are rectangular in cross serction, as seen at Fig. 2, and fit in rectangular holes formed in the lower ends of the arms 7 8. When the pinion 10 begins to rotate in a direction to drive the carriage back or to the left at Fig.

. 1, the rack alone moves. at first, the carriage remaining stationary, and thereby the pinion 64 is rotated and a crank 67, provided upon the upper end of the pinion-shaft 63, is swung rearwardly, thereby drawing back the slide 68, which carries the usual pawl 69 to engage the ratchet 70 for effecting partial rotation of the platen 3. this situation until the key 25 is released and the pole-changing devices return to normal position, whereupon the pinion 10 rotates in the opposite direction and restores the rack The parts remain in 9 to its original position relatively to the carriage, Fig. 1, returning the crank 67 to its forward position and permitting the usual spring 71 to return the slide 68. Thelatter may be operated when desired by the usual line-space lever, a part of which is seen in section at 72. The slide has a longitudinal solt 73 to receive the crank 67, whereby a line-spacing movement of the slide is permitted independently of said crank 67.

The carriage is provided With a letterspacing rack 74, meshing with a inion '75, connected to an escapement-Whee 76, controlled by feeding-dogs 77, operated at thetype-bar strokes through the medium of a universal-bar frame 7 8, actuated by the typebars 2, all in the usual manner.

Variations may be resorted to within the scope of the invention, and portions of the y i rovements may be used without others. aving thus described my invention, 1 claim 1. In a type-writin machine, the combnation with a letter-.eeding carriage, of a motor having unifornr pull or torque and connected to said carria e to drive it in both directions, a key at the eyboard of the machine, means controlled by said key for reversing the direction of said motor, and a spring for returning said key to normal position, 1n which the parts are set to cause the motor to drive the carriage in letter-feeding direction.

2. In a type-writin machine, the combination with a letterceding carriage, of a motor having substantially uniform torque and connected to said carriage, akey, a pair circuit with the armature of said motor, said pole-changerflcom rising a pair of contactknives fixed toget er and pivoted, and a pair of fixed contacts for each end of each knife,

and a key connected to said contact-knives and having a spring for returning the key and knives to a position for closing thecircuit, so as to drive the carriage in letter-feeding direction. Y

4.. In a type-writing machine, the combi nation with a reversible motor, of a letterfeeding carriage connected thereto, a 'pole changer in circuit with the motor, a key controlling said pole-changer, and normally in position for driving the carriage in letterfeeding direction, and acarriage-brake operated by said key.

5. In a type-writing machine, the combination with a reversible motor, of alett-erfeeding carriage connected thereto, polechanger in circuit with the motor, a key con trolling said pole-changer and normally in position for driving the carriage in l etterfeeding direction, a brake for said carriage, and mechanism connecting said brake and said key, so that the latter when it is de pressed for reversing the carriage, brings said brake automatically into action.

6. In a type-writing machine, the combination with a reversible motor, of a letterfeeding carriage connected thereto, a polechanger in circuit with the motor, a key controlling said ole-changer and normally in position for riving the carriage in letterfeeding direction, a brake for said carriage, and mechanism, connecting said brake and said key, so that the latter when it is depressed l'or reversing the carriage, brings said brake automatically into action; said connecting mechanism including a art adjustable for varying the pressure of the brake.

7. In a type-writing machine, the combination with a reversible motor, of a letterfeeding carriage connected thereto, a polechanger in circuit with the motor, a key controlling said pole-changer and normally in position for driving the carriage in letterfeeding direction, a brake for said carriage, and mechanism connectmg said brake and,

said vkey, so that the latter when it is depressed for reversing the carriage, brings said brake automatically into action; said connecting mechanism including a part adjustable for varying the pressure of the brake, and a stop being provided for arresting the downward stroke of said key.

8. In a type-writing machine, the combination with a reversible motor having substantially uniform torque, of a letter-feeding carriage connected to said motor, a pole changer in circuit of said motor, a key connected to said pole-changer, a spring for returning the key and pole-changer to normal position in which the circuitis closed for driving the carriage forward, a carriagebrake controlled. by a second tabulator-key,

and adjustable means for enabling said polechanging key to depress said second key.

9. In a type-writing machine, the combination with a reversible motor having subcarriage connected to said motor, a polechanger in circuit of said motor, a key con nected to said pole-changer, a spring for returning the key and pole-changer to normal position in which the circuit is closed for driving the carriage forward, a carriagebrake controlled by a second tabulator-key, adjustable means for enabling said polechanging key to depress said second key, and adjustablemechanism including an arm extending from the tabulator-key and having an adjustable screw to be engaged by the pole-changing key.

10. In a type-writing machine, the combination. with a carriage having a rack, of a pinion meshing with said rack, an electrical motor connected to said pinion, and a polechanging key for controlling said motor, and escapement devices controlling the movements of said rack and motor in one direction.

11. In a type-writing.machine, the combination with a carriage havin a rack, of a pinion meshing with said rac a shaft for said pinion, a motor geared to said shaft, escape ent devices controlling the advance movements of said rack and motor, and a key for reversing said motor and carriage.

12. In a type-writing machine, the combination with a carriage having a rack, of a pinion meshing with said rack, a shaft for said 7 stantially uniform torque, of a letter-feeding loo pinion, a motor geared to said shaft, and a 1 pinion, a motor geared to said shaft, and aey for reversing said motor; said rack being mounted upon said carriage for a short endwise movement, and a line-spacing mechanism operable by said rack, and including a pinion engaging the rack-bar, a shaft upon which said pinion is mounted, a crank upon said shaft, and connections from said crank to the usual line-spacing-pawl.

14. In a type-writing machine, the combination with a letter-feeding pa er-carriage having arms at its ends, of a rac supported by its ends in said arms for a short endwise movement, a pinion meshing with said rack, a reversible motor geared to said pinion, a crank at one end of the carriage connected to the adjacent end of said rack, and line-spacing devices at the same end of the carriage and operated by said crank.

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, 15. In a typerwriting machine, the combination with a letter-feeding paper-carriage having arms at its ends, of a rack supported by its ends in said arms for ashort endwise movement, a pinion meshing with said rack, a reversible motor geared to said pinion, a crank at one end of the carriage connected to the adjacent end of said rack, and line-spacing devices at the same end of the carnage and operated by said crank; said line-spacing devices being operable by the usual linespace lever independently of said rack.

16. The combination in a type-writing machine having a lettenfeeding carriage and airamework, of a motor geared to said carriage, a bracket whereon said motor is supported, said bracket being secured to the under side of the framework by means of screws,

and feet also attached to the framework by means of the same screws; the bracket being 20 between the feet and the base of the machine.

17. The combination in a type-writing machine having a letter-feeding carriage and a framework, of a motor geared to said car'- riage, a bracket whereon said motor is supported, said bracket beingfecured to the under side of the framework ymeans of screws, and feet also attached to the framework by means of the same screws; the bracket being between the feet and the base of the machine and consisting of two side arms throu h which pass {our of said screws and a yo e connecting said arms, the motor being directly attached to said yoke.

EDWARD F. KUNATH. Witnesses:

JonN G. KOPF, Krrrrn FRANKFORT. 

